David A. Aguilar

• 13 planets
• National Geographic Little Kids First Big Book of Space
• Planets, Stars, and Galaxies
• Enciclopedia del espacio
• Space Encyclopedia
• Space encyclopedia
• Natinoal Geographic Kids - Uzay Ansiklopedisi
• National Geographic Kids - AY
• Planets, Stars, and Galaxies
• Seven Wonders of the Milky Way
• Seven Wonders of the Solar System
• Super stars the biggest, hottest, brightest, and most explosive stars in the Milky Way